Sewing-machine.



No. 7|0,|5o. Patented Sept. 30, I902.

J. T. HOGAN.

SEWING MACHINE.

(Application filed Oct. '23, 1900. (No Model.) 3 Sheets-Sheet I.

WITNESSES: I e I INVENTOR HIS ATTORNEY No. 710,150. Patented Sept-30, I902. v -.1. T. HOGAN. I

. SEWING MACHINF.

(Application filed Oct. 2 3,, LQQQA) 3 Sheets-Sheet 2.

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J I g cw .v Y J WITNESSES: INVENTOR fl V v 7m0Z Egyamh Q BY @4 4 4%. a;

HIS ATTORNEY No. 7|0,l50. Patented Sept. 30, I902.

J. T. HOGAN.

SEWING MACHINE.

(Application filed Oct. 23, 1900. (N w M o d e l WITNESSES INVENTOR ms ATTORNEY Nrrnp STATES PATENT amen.

JAMES T. HOGAN, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO THE NATIONAL MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORA- TION OF NEW YORK.

SEWING- MACHINE.

SPECIFICATION forming part of Letters Patent No. 710,150, dated September 30, 1902.

1 Application filed October 23, 1900. Serial No. 34,024. (No model.)

' seaming-machine in which the needle has both a reciprocating and a vibratory movement and the work support the ordinary straightaway feed. The attachment may also be applied to machines where it is desired to sew tying-stitches, either during the sewing operation or at the completion of a cycle of movements.

For the purpose of specific illustration I have shown my invention applied to a buttonsewing machine of the character described in an application filed by me December 18, 1899,

Serial No. 740,642. WVhen so applied, the needle will form a series of tying-stitches at the end of the sewing on of the button.

In order that others may understand and use myimproved mechanism, I will describe the same, referring by letters to the accompanying drawings, forming part of this specification, in which- Figure 1 is a side elevation of a sewing-machine, certain parts being broken away. Fig. 2 is an inverted plan viewof the parts below the bed-plate which effect certain movements during the sewing operation. Fig. 3 is a vertical section on the plane of the line 3 3 of Fig. 1. Fig. 4 is a detailed view of the latch mechanism. Fig. 5 is a'face view of the cam which vibrates the button-clamp and effects the adjustment of the latch mechanism. Fig. 6 is a detail View of a cam-lever, and Fig. 7 is a diagrammatic view showing the manner of laying stitches in sewing a button upon a machine having the present invention attached.

Similar characters indicate similar parts in the several views.

With the present form of attachment a button-sewing machine may be operated to sew four-holed buttons or two-holed buttons, as maybe desired. I will first describe the construction and the method of operation for sewing four-holed buttons and then the changes that may be made to sew two-holed buttons. Whatever the character of the button to be sewed, whether four-holed or two-holed, the purpose is to tie the thread at the end of the sewing operation to prevent raveling.

Adesignates the bed-plate, and A the head, of a machine of the usual construction, A the main shaft, which may be driven in any suitable manner; B, the needle-bar carrying .the needle b", the said bar being mounted in the frame and reoiprocated by the usual connection from. the shaft A The needlebar B is also given a-vibratory movement by the pitman B attached to the main rock-lever B.

E designatesany suitable form of button holder or clamp.

Instead of connecting the lever B directly to the (:amB, as is usual, I provide the mechanism whichI will now describe.

C designates a shaft mounted in suitable hearings in the head of the machine. This shaft has rigidly secured thereto a supplementary rock-lever D, which carries upon its under face a stud and follower 61 which follower travels in the groove of a cam B. This cam is of the usual form of construction,

forming partof a bevel-gear A which meshes with a corresponding gear A on the main driving-shaft A Bymeans of the cam B a rocking movement is given to the shaft C and the attached lever'D.

The lever D serves as a support and a guide for a latch-carrier L. This latch-carrier is slotted near its lower end, as shown at Z, to receive the shaft C, the slot permitting lengthwise movement of the latchcarrier. The

lever D is provided near its upper end with guide projections d and cl, the. former projeoting beyond the edge of the latch-carrier L, so as to form a stop for the forward movement of the lever B. The latch-carrier has secured at its upper end a plate L, having a projecting finger c, this plate and finger forming a latch to lock the lever 13, which lever is mounted loosely on the'shaft- C, so

too

that it shall partake of the rocking movement of the lever D and latch-carrier L by the cam 13, a notch Z) being provided in the upper edge of the lever B to receive the position.

In my button-sewing application, Serial No. 740,642, the needle-bar and button-holder are simultaneously vibrated in directions at right angles to each other. The vibratory movement of the button-clamp is effected by means of a suitably-constructed cam. This cam I have so modified in the present construction as to effect the suspension of the vibratory movement of both the button-holder and the needle at the end of the ordinary sewingoporation, so as to give any suitable number of tying-stitches. This cam is mounted on a stud on the under side of the bed-plate of the machine and is given a rotary movement by means of the lever 11*, actuated from the main driving-shaft, the pawl-carrying lever H and ratchet-wheel H. The button-holder is secured to a plate actuated by a lever G, to which lever is secured a follower g, engaging the cam H. A face view of the cam H is shown in Fig. 5 divided by radii, so as to make clear the exact movements of the'button-holder. At the beginning of the sewing operation the needle is at the limit of its" up per throw and the cam-followerisintermediate the space 1.8 and 1. The cam travels in the direction of the arrow and imparts a vibratory movement to the button-holder, except for the dwells in the spaces 9,16,17, and 18. By the simultaneous vibration of the needle and button-holder a series of eight stitches will be sewed between the holes 1 2, Fig. 7. While the follower is in thespace 9 of the cam H the vibratory movement of the button-holder is suspended, but that of the needle continues. This gives thecrossstitch between the holes 2 3. The vibratory movement of the button-holder is then resumed and six stitches sewed between the holes 3 4. At this point it is necessary to suspend the vibratory movement of both needle and butv ton-holder.

The vibratory movement of the button-' vibratory movement of the button-holder and needle shall be of thesame duration. When the cam-follower passes into the dwell 16 18, the cam-point of the plate F contacts with the projection t on a lever I. The projection i may be an integral part of the lever I, or, as shown, it may be separate, forming part of a plate i, which latter will be secured to the lever I with screws. This lever I is fulcrumed on a pin in a bracket I secured to the under side of the bed-plate, and its forward end rests on a collar I secured to the end of a vertical shaft 0. A lever M, fulcrumed on a stud in a suitable hanger, is secured to the u pperend of the vertical shaft 0, the forward end of the lever M resting in a curved slot l of the latch-carrier L. It is evident from this construction that when the vertical shaft 0 is depressed by the cam-plate F the forward end of thelever M will be pressed against the upper edge of'the slot Z This movement of the lever M will raise the latch-carrier L to release the finger e from the notch b of the lever B. When the lever B is thus released, it is clear that while the vibratory movement of the latch-carrier L.continues no vibratory movement will be given the said lever, and the vibratory movement of the needle will then be suspended. The spring b draws the lever B when it has been released to the position shown in Fig. 4. The length of the dwell 16 18 of the plate F is such that three tying-stitches will be sewed. When the camfollower g reaches the end of portion 18 of the cam H, a stop-motion, which will be attached to the machine, will come into operation. This will bring the machine to a stop as the needle reaches the limit of its upper throw and in a position tobegin the sewing of a new button. Any suitable stop-motion may be employed-for example, that shown in a. patent grantet'l to me March 6, 1900, No. 644,801. The cam B is so timed that when the needle is at its upper throw the latch-carrier L will be thrown to its extreme position at the right, and as the plate F passes out of'contact with the camlever I the spring 0', which is seated between collars on the shaft 0, will lower the outer end of the lever M so as to bring the finger 2' into the notch 11, thus locking the lever B in such position that it will be vibrated by the cam B.

If it is desired to sew a two-holed button, I may do so by suspending either the vibratory movement of the needle or of the button-holder. To suspend the vibratory movement of the needle, the screw-cap 12 which retains the end of the pitman B on the stud 19 is removed and the pitman connected to the stud 19 which stud is a part of the shaft 0 or is secured thereto and coincident with its axis. When the pitman B is thus connected, it is clear that no vibratory movement will be imparted to it; The vibratory movement of the button-holder continues so as to sew eight stitches between the two holes, then one tying-stitch,while the follower llO is in the space marked 9 of the cam 11, then six more stitches, and finally three tyingstitches.

To sew two-holed buttons by the vibratory movement of the needle .only, I remove the cam-follower g, when no vibratory movement can be imparted to the button-holder. The cam, however, continues to rotate, and at the proper time the cam-plate F will actuate the lever I to release the lever B from the latch L. The cam B imparts the vibratory movement to the pitman Bfland the lever B is released to give three tying-stitches at the end of the sewing operation corresponding to the dwell 16 18 of the cam H. When the cam-plate F passes out of engagement with the lever I, the lever B will be locked to the latch-carrier L in the manner before described.

Any desired number of stitches may be sewed, and I have merely for the purpose of convenience in description shown the cam as constructed in Fig. 5. \Vhatever' the number of divisions of the cam H may be the number of teeth on the ratchet-wheel H will correspond thereto. This correspondence insures accurate timing of the parts, for what-' ever may be the position of the follower in the cam H the movements of the buttonholder and of the lever M will follow each other in the order necessary to secure the results described.

WhileI have described my invention in connection with a button-sewing machine, it is to be distinctly understood that I do not limit myself thereto, as the above-described attachment for suspending the vibratory movement of the needle-bar may be used on overseamiugmachines. Any suitable cam may be employed in such case to trip the lever M, or it may be tripped by hand through a suitable connection, as P,to depress the shaft 0. When so used, a series of overseaming-stitches may be sewed and then the vibratory movement of the needle suspended while straight stitches are being sewed, then the overseaming resumed at will or according to the particular pattern-cam employed.

What I desire to claim and secure by Letters Patent isc 1. In a sewing-machine the combination with stitch-forming mechanism comprising a vertical reciprocating needle, of a work-support, means to feed said support, a rock-lever and means to actuate the same, a pitman connecting said lever and the needle-bar frame, and means to simultaneously suspend the movements of said lever'and the feed of the work-support at the end of the sewing of a cycle of stitches while the vertical reciprocating movement of the needle continues, to permit the sewing of tying-stitches, substantially as described.

2. In a sewing-machine the combination with stitch-forming mechanism, of a work support, means for simultaneously vibrating the needle and work-support and means to antomatically and periodically suspend the vibratory movement of both of said devices at the'same time to permit tying-stitches to be sewed, substantially as described.

3. In a sewing-machine the combination with stitch-forming mechanism, of-a. worksupport, a cam for imparting to the worksupport a vibratory movement, means for imparting to the needle a vibratory movement in a direction at right angles to the plane of movement of the work-support, a lever actuated by said cam to suspend the vibratory movement of the needle, said cam being so constructed as to. cause the suspension at the same time of the vibratory movement of the work-support, substantially as described.

4. In a'sewing-machine the combination with stitch-forming mechanism, of a worksupport, a rock-shaft, a lever rigidly secured to said shaft and engaging a cam, a main rock-lever loosely mounted on said shaft, a pitman connecting said last-named lever to the needle-bar, a latch'connection between said levers, a cam and suitable connections to impart to the work-support a Vibratory movement, levers between the said lastnamed cam and said latchmechanism, said cam being so constructed as to simultaneously suspend the vibratory movement of the work-support and to release said latch'to permit the sewing of tying-stitches, substantially as described.

5. In a sewing-machine the combination with stitch-formingmechanism comprising avertically-reciprocating needle, of a worksupport, means to vibrate said work-support in a given path relatively to the needle and means to automatically suspend said vibratory movement while the vertically-recipro-- eating movement of the needle continues, to permit the sewing of tying-stitches, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

1 JAMES T; HOGAN.

Witnesses:

H. COUTANT, CHARLES S. J ONES. 

